Pith Number

pith:VBPNKQWT

pith:2020:VBPNKQWTCET2AMRJ36JW5HYKMK

not attested not anchored not stored refs pending

Human-Agent Cooperation in Bridge Bidding

Edward Lockhart, Lucas Smaira, Neil Burch, Nolan Bard, Ray Smith, Sebastian Borgeaud, Tom Eccles

arxiv:2011.14124 v1 · 2020-11-28 · cs.AI

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VBPNKQWTCET2AMRJ36JW5HYKMK}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-05T01:55:17.513440Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a85ed542d31127a03229df936e9f0a629a5372e61c58d41d527ddb3db005638a

Aliases

arxiv: 2011.14124 · arxiv_version: 2011.14124v1 · doi: 10.48550/arxiv.2011.14124 · pith_short_12: VBPNKQWTCET2 · pith_short_16: VBPNKQWTCET2AMRJ · pith_short_8: VBPNKQWT

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/VBPNKQWTCET2AMRJ36JW5HYKMK \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: a85ed542d31127a03229df936e9f0a629a5372e61c58d41d527ddb3db005638a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7ecf7cbbc5e8e5925df845ba6af70981a0c4179c013bab1b478000c77d953c90",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2020-11-28T12:37:02Z",
    "title_canon_sha256": "d0f9ea81d48a3d09c257bd196f84696c8129221d04d54f86253872e33e0a6304"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2011.14124",
    "kind": "arxiv",
    "version": 1
  }
}